Mixing apparatus



G. H. HAINES MIXINGAPPARATUS Filed Oct. 5, 1929 w m Y m o@ 3 9h v l llhI-illlhlll L 1| Alla 5 4 ni, 6 ,r f 3 47| 6 H m l n H1111 Il NWUIILHII IIIIHMMIMMUMM lll. 11.5.1.1 m

.1.. n.7 .Jl F u Patented `luly 1, Y193() `l '1 UNITED STATES PATENT OFFICE;

'GEORGE rr. HAINES, OF CALEDONIA, OHIO, AssIGNoa'ro THE GRAIN MACHINERY COMPANY, or MARIGN, OHIO, A CORPORATION@ OHIO Y MIXING-APPARATUS f Application filed October', 192B. Serial No. 397,513.

My invention-relates to mixing apparatus, andvmore particularly tov apparatus suitable for the mixing of feed for live stock, but it may be employed also .Y in theY mixing and conveying of other materials, and constitutes an improvement upon the disclosure of my PatentNo. 1,721,553, issued July 23, 1929. I l

Heretofore in the use of mixersand conveyers of `,the vertically-disposed screw type, it has been deemed necessary to employ force feed apparatus to direct the material laterally into` the conveyer' conduit or, in the case of mixers, either to provide force feed for introducing the materiall to the screw kor yto introduce the material through thev top of the mixing chamber. In the case of forced feed apparatus, additional` power is required, while in both instances 2o it has been. necessary` to lift the bags of material in order to pour the material into thehopper Aof the feed apparatus or into the :top of the mixing chamber. 1

` One object'ofmy invention is to provide an apparatus wherein the necessity for a forced feed device and for lifting the material are avoided.v Y f Anotherl object of my invention is Vto simplify and improve generally the struc- 3,0 ture `and operation of conveying and mixing devices. o C One form which my invention may take is shown in the accompanying drawing, `wherein Figure 1 is a vertical sectional View of the apparatus, and Fig. 2 is a view taken on the line II-II of Fig. 1.

1n the drawing, I have shown a mixing chamber 3 having a hopperflike portion A and an extended cylindrical portion 5. The 4.0 cylindrical portion 5 is flared at itsA lower end to form a charging chamber 6. A shaft is vertically disposed centrally of the mixing chamber 3 and extends into the conveyer or hood portion 6 ofthe cylindrical conduit 5. A screw conveyer is carried by the shaft 7 and has an upper portion 8 thereof disposed within the cylindrical conduit 9 that is held in place withinthe chamber 3 by means of brace rods 10, 11 and 12.` The 5o screw conveyer has an intermediate enlarged portion 13 kdisposed within a shortvcylinder 14 that is mounted, inthe conically-shaped lower end or hood 15 of the cylinder 9 and functions asset forth in my said patent.

Adjacentto its lower end, the screw is .-f

enlarged as indicated at 16 to fit withintho charging chamber 'of the cylinder 5. The

. enlargedportion 16 of thescrew is of greater diameter or .radius thanV portions 8V yand 17 thereofand is also shown as of smaller pitchthan the upper portions of the screw.v

It hasV been found thatif the lower` end ofthe screw be of sufficient diameter, material lwill be advancedfrom the chamber6 upwardly, without the necessity forA forcing the vmaterial into suoli chamber. Again," if the pitch is sufficiently small, the material Awill also be forced up without the necessity of the force feed. By having the lower portion 16 of the screw both sufliciently wide f and small enough pitch, material is advanced upwardly more elfectivelythan if the screw were only widened in the cham-V ber' 6', or if it were of uniform diameter throughout its length and the pitch shortened in that portion lying within the chamber 6.

The diameter of the lower portion of the screw or its pitch, 4or both, willbe detervmined by the character of material to be j conveyed into the mixing chamber. v The chamber 6 is preferably disposed be low the Hoor level 18, to avoid the necessity for lifting the bagspof materials which are to be introduced therein. A hopper 19 extends upwardly through the floor 11 and at its lower end communicates with the cham ber 6 through the opening 2O in the wall thereof, `so that material dumped into the hopper 19 will be caught by the conveyor and elevated-to ythe mixing chamber.

Inrthe operation of the apparatus, sufficient material will be dumped into thehop- ,per 19 to yapproximately ll the mixing chamber 3 when itis conveyed theretoby the screw, andfsuch material will beconveyed by theportions 18 and 8 of the screw up.

-wardly through the` conduit 9 from whence it will fall into the space surrounding-such conduit and pass downwardly past the hood et f to 'l 15 vtobeA again caught the screw and passed through the conduit 9such circula-- .u-pon it willbe drawn oiifthrough a valvecontrol'ledspout 22 into sacks." i

-Further` as to the utility yof having that portionotthe screw conveyer `within the `charging?chamber Soi? larger diameter and smaller pitch .than thefportionl within the Vtheisteeper pitch portion of the screwin the conduit 9 eiiectsaV more .rapid imovement j en l conduit 9, it will ofcourse be apparent that of the material andfheiice faster mixing than j the materials in they chamber 9 and restrictionafforded bythe hopjier` aroundthe lower 'end of the conduit produces pressure on the material and contines it so that it will be engagedL by` the screw and carried up through the conduit 9 instead of being thrown oliby` centrifugal force. Y y jOn the'votherhand there [is rlittle `pres i surelof feedmaterials `within thecliarging chamber 6,? so that if the screw` were not of f "sufficiently small pitch, kforce Vfeed Vwould be *"refquired inf order to enable the-screw to carry Vthematerji'al,up fromthecha'mber 6. The

wideningio'f the jdiameterofthis portion 16 Y K otthe :Screw "compensates, for theffloss in effectiveadvancinglrate ofthe smaller pitch. Another "advantagejinhaving.V thev screw of as great pitch as* practicable throughout the `major `po`rtioii`if` its"v len'gtliarisesfrom, Y Vthe fact that iiirsuch `a screw therey is less` frictioiial losses than -in thefease of a screw rin with a 1 greater 4number of turns and' the wider pitch screw is less expensive to build:

`Iclaini as my invention f I il.Mi`Xing. `apparatus comprising aQmiX-` -ing chamber, ai vertical conduit inv said' chamber;V #a :screw gconvel'yer operating in j said conduit, a receiving chamber surround- Aing theylofwer Vend'.oiisaid conveyeri 'and 'disposedbeneath-said mixing chamberAV and said conduit", and means 'for directing Vmaterialy in a generally downward direction into chamber, ascrew. conveyer operating in said conduit","a* receivingfzchambei" surrounding tlielower lendu fisaid conveyerV and disposed beneath sai'd clian'iber andV said conand means for directing 'Y material in y agenerallydownward,directionintothe said. l i receiver c :lianibei",that,portionfo-thecon-V veyer screwr nuthin the receiving-chamber ifgthe pitch werelsmaller. VThepressure\ety tically disposed screw conveyer, a casing surrounding said conveyer and having a side opening adjacent to its lower end, and a hopper for directing material through said opening, the conveyer screw being oi relatively'greater diameter adjacent to its lower vend and the casing closely surrounding the screw. Y 4. Conveying apparatus comprising vertically-disposed screw conveyer, a casing sur rounding said conveyer and having aside vopening `adjacent to its lower end, and a Y hopper Vforl directingV material through such opening, the conveyer screw being of relatively small pitchadjacent to its lower end. i '5. Conveying apparatus comprising a vertically-disposed screw. conveyer, a casing Vsurrounding said conveyer. andhaving an opening adjacent 'toits. lower end,l and a hopper for directing material through such opening, the conveyer screw being ofk rela- ,tively greater diameter adjacentto its lower end, andthe casing closely surrounding the screw.

. 6. Conveying and mixing apparatus, com-v the screw,a casing surrounding the upper portion ot the screw and'vertical-ly-spaced :troniithe lower casing, and achamber disposed circumfereiitial-ly otitlie second-named casing, the lower portion of the screwlbeing Vof greater diameter thantheupper,portion thereof. i y 37. Conveying and mixing apparatus coinc prising a vertically-disposed screw conveyer,

a casing surrounding the lower 'portion of the screw, afcasing ysurrounding theupper portion of the screwl and vertically-spaced from the lower casing,` and `a vchamber disposed ciicumferentially ot the secondnamed casing, the lower portion of the screw being of smaller pitch than :the upperportion thereof.' rf i In testimony whereof I', Athe' said'Gnoizen H. HAiNns, have hereunto set my hand.l Y GEORGE H. HAINES.

j f the said receiving'chamber, that portion of Y y 50 pitch thanthe up-v beingfof greater-diameter' tima-*uis upper' portionfsfthereof. y

y 3. .Conveyingapparatus Vcompifising a' ver-p l 

